Nikon NPL-322, Instruction Manual

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Total Station NPL-322 Instruction Manual 15
Preparation 2
5. Use the plate level to level the instrument. For detailed instructions, see
Leveling, page 16 .
6. Look through the optical plummet to check that the image of the station point is
still in the center of the reticle mark.
7. If the station point is off center, do one of the following:
–
If the station point is slightly off center, loosen the tripod mounting screw
and then center the instrument on the tripod. Use only direct movement to
center the instrument. Do not rotate it.
When the instrument is centered, tighten the mounting screw.
–
If the displacement of the station point is major, repeat this procedure
from Step 2.
Centering using a plumb bob
1. Set up the instrument on the tripod. For detailed instructions, see Setting Up the
Tripod, page 14 .
2. Hang the plumb line on the hook of the tripod mounting screw.
3. Adjust the length of the plumb line so that the tip of the plumb bob is at the
height of the station point.
4. Loosen the tripod mounting screw slightly.
5. Using both hands to support the outer side of the tribrach, carefully slide the
instrument about on the tripod head until the tip of the plumb bob is positioned
over the exact center of the station point.
Note – To confirm that the instrument is precisely aligned, check its position from two
directions at right angles to each other.